mid-15c., from Latin dativus "pertaining to giving," from datus "given" (see date (n.1)); in grammatical use from Greek dotike (ptosis) "dative (case)," from dotikos "of giving nature," from dotos "given," from PIE root *do- "to give," from the same PIE root as the Latin word. In law, "that may be disposed of at pleasure," from 1530s.